Animal Sounds

What sound does a frog make?
Gero gero (げろげろ)

What is the onomatopoeia for "kiss"?
Chuu (ちゅっ)

What sound does a cat make?
Nyan (にゃん)

What is the onomatopeia for "heartbeat"?
Doki doki (ドキドキ)

What sound does a dog make?
Wan wan (わんわん)
What is the onomatopeia for "smile"?
Niko niko (ニコニコ)